OR CDL Passenger study materials
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OR CDL Passenger key terms

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Pre-trip inspection

A systematic check of the bus before driving, covering tires, brakes, lights, mirrors, emergency exits, fire extinguisher, and warning devices. A driver must perform and document it, and report defects that affect safe operation before carrying passengers.

Related: Post-trip inspection, Reflective triangles, Emergency exit
Post-trip inspection

A walk-through of the bus after a run to find passengers left aboard, lost items, damage, and mechanical problems. Findings are logged and defects reported so they are fixed before the vehicle goes out again.

Related: Pre-trip inspection, Child check
Child check

A required sweep of the entire bus interior, including under seats and in the rear, after every trip to ensure no sleeping or hiding child is left behind. It is documented and often paired with a reminder tag or alarm system.

Related: Post-trip inspection, Passenger management
Emergency exit

A door, window, roof hatch, or side panel designed for rapid evacuation. Each must be marked, operable from inside without tools, and kept unobstructed so riders can escape during a fire or crash.

Related: Emergency exit marking, Fire extinguisher
Emergency exit marking

The signage and instructions at every exit telling riders how to open it. Markings must be legible, lit when required, and not covered by seats, luggage, or advertising, so passengers can find and use the exit quickly.

Related: Emergency exit, Passenger briefing
Fire extinguisher

A portable extinguisher carried on the bus, securely mounted, charged, and within reach of the driver. It must be the correct type and size, inspected regularly, and used only to fight a small fire while evacuating passengers.

Related: Emergency exit, Reflective triangles
Reflective triangles

Warning devices placed behind a stopped bus to alert approaching traffic, typically required when stopped on a road or shoulder in poor visibility. They are stored securely and placed at increasing distances to give drivers time to react.

Related: Hazard warning lights, Pre-trip inspection
Hazard warning lights

Four-way flashers used to warn other drivers when the bus is stopped, disabled, or moving slowly. They supplement, but do not replace, reflective triangles and should be turned on immediately when a hazard develops.

Related: Reflective triangles, Emergency exit
Standee line

A marked line near the driver showing where standing passengers may not cross. Riders must stay behind it so the driver's view and control of the bus are not blocked, and standing is allowed only where rules permit.

Related: Standing passenger, Passenger management
Standing passenger

A rider who remains on their feet while the bus is moving. Standing is allowed only when the bus is designed for it and space exists; the driver must start and stop smoothly and watch for balance problems.

Related: Standee line, Smooth braking
Baggage prohibition

A rule against carrying items that block aisles, exits, or the driver's view, or that are too large or heavy for secure storage. Drivers must refuse or stow such items so evacuation routes stay clear.

Related: Emergency exit, Hazardous materials prohibition
Hazardous materials prohibition

A ban on riders carrying explosives, flammable liquids, compressed gas, poisons, or other dangerous goods aboard a passenger vehicle. Drivers watch for suspicious packages and may refuse boarding when a material poses a risk.

Related: Baggage prohibition, Passenger management
Passenger briefing

A short safety announcement before departure covering exits, seat belts where fitted, emergency procedures, and rules of conduct. It prepares riders to act quickly and is often required on charters and school trips.

Related: Emergency exit marking, Passenger management
Passenger management

The driver's control of boarding, seating, conduct, and disembarking to keep order and safety. It includes enforcing rules calmly, refusing unruly riders, and intervening early before a dispute escalates.

Related: Passenger briefing, Distracted driving
Distracted driving

Any activity that takes a driver's eyes, hands, or attention away from the road, such as talking to riders, using a phone, or adjusting controls. Passenger vehicles demand extra attention because riders and stops constantly compete for focus.

Related: Passenger management, Hazard perception
Hazard perception

The skill of scanning ahead and recognizing developing risks, such as a pedestrian near a crosswalk, a car drifting in a lane, or a rider standing too soon. Early recognition gives the driver time to slow smoothly.

Related: Following distance, Distracted driving
Following distance

The gap kept behind the vehicle ahead, measured in seconds. A larger gap is needed with passengers aboard because a loaded bus stops more slowly and any sudden braking can injure standing riders.

Related: Smooth braking, Stopping distance
Smooth braking

Applying the brakes gradually and progressively so riders are not thrown forward. It means looking far ahead, easing off the accelerator early, and avoiding hard stops unless an emergency requires them.

Related: Following distance, Brake fade
Stopping distance

The total distance traveled from recognizing a hazard to a full stop, combining perception, reaction, and braking distance. It grows with speed, weight, and poor road conditions, so a loaded bus needs more room.

Related: Following distance, Brake fade
Brake fade

Loss of stopping power when brakes overheat, common on long downgrades or after repeated hard use. The pedal may feel soft and the bus may not slow as expected; the driver should downshift and use engine braking.

Related: Engine braking, Smooth braking
Engine braking

Using a lower gear so the engine's compression slows the bus without relying on the brakes. It controls speed on hills and reduces heat buildup, protecting the service brakes for when they are truly needed.

Related: Brake fade, Smooth braking
Skid

Loss of tire grip in which the bus slides rather than follows the steering. It happens from braking too hard, accelerating too fast, or turning too sharply on wet, icy, or gravel surfaces.

Related: Wheel lock-up, Skid recovery
Wheel lock-up

A condition where braked wheels stop turning and slide, removing steering control. Anti-lock brake systems prevent it by pulsing brake pressure, but drivers should still brake firmly and steer where they want to go.

Related: Skid, Anti-lock brake system
Anti-lock brake system

An electronic system that rapidly releases and reapplies brake pressure to keep wheels rolling during hard stops. It preserves steering control, and the driver should keep steady pressure on the pedal rather than pump it.

Related: Wheel lock-up, Skid recovery
Skid recovery

The actions taken to regain control when the bus slides: release the brake or accelerator, look and steer where you want to go, and avoid sudden corrections. Smooth inputs let the tires regain grip.

Related: Skid, Wheel lock-up
Hydroplaning

Riding on a thin layer of water so tires lose contact with the road. Steering and braking fade, and the bus can drift; the driver should ease off the accelerator, avoid hard braking, and wait for grip to return.

Related: Skid, Following distance
Railroad crossing

An intersection where tracks cross the road, requiring the bus to stop unless a signal or official directs otherwise. The driver opens the door, listens, looks both ways, and crosses only when there is room on the far side.

Related: Railroad crossing stop procedure, Hazard perception
Railroad crossing stop procedure

The steps at a crossing: stop short of the tracks, open the service door or window to listen, check signals and both directions, then proceed without shifting gears. Passengers should be quiet so the driver can hear.

Related: Railroad crossing, Passenger briefing
Bus stop

A designated place where riders board and leave. The driver pulls in close to the curb, stops smoothly, watches for riders crossing in front, and pulls out only after checking mirrors and signaling.

Related: Loading and unloading, Passenger management
Loading and unloading

The process of taking riders on and off, including stopping safely, controlling doors, watching the step and curb, counting passengers, and ensuring no one is caught in the doors before moving.

Related: Bus stop, Child check
Danger zone

The area around the bus where riders are hard for the driver to see, especially directly in front, behind, and along the sides. Riders should be taught to stay visible and wait until the bus has fully stopped.

Related: Loading and unloading, Blind spots
Blind spots

Areas around the bus that cannot be seen in the mirrors, including large zones beside and behind a long vehicle. Drivers adjust mirrors, turn the head, and use convex mirrors to check them before any maneuver.

Related: Danger zone, Bus stop
Mirror adjustment

Setting flat and convex mirrors so the driver can see the sides, rear, and the area near the front bumper. Correct adjustment reduces blind spots and helps spot riders approaching the bus.

Related: Blind spots, Pre-trip inspection
Seat belt use

Wearing the lap and shoulder belt, where installed, and requiring riders to do the same. Belts keep the driver in control during sudden moves and reduce injury; the driver sets the example by buckling up first.

Related: Passenger briefing, Smooth braking
Emergency evacuation

Getting everyone off the bus quickly and safely during a fire, crash, or other danger. The driver picks usable exits, directs riders calmly, helps those with disabilities, and moves the group away from traffic.

Related: Emergency exit, Fire extinguisher
Fire prevention

Practices that reduce the chance of a bus fire, such as checking for leaks, keeping flammable materials away from hot parts, and watching for smoke or burning smells. Early detection allows a safe stop and evacuation.

Related: Fire extinguisher, Emergency evacuation
Defect reporting

Telling the responsible person, in writing when required, about any mechanical or safety problem found during inspection. A defect that affects safe operation must be repaired before the bus carries passengers.

Related: Pre-trip inspection, Post-trip inspection
Hours of service

Rules limiting driving and on-duty time and requiring rest breaks. Fatigue slows reaction and judgment, which is especially risky with passengers aboard, so drivers track their time and report it accurately.

Related: Hazard perception, Distracted driving